米6体育平台手机版

ZHCSNJ0G September 2006 – March 2021 PCA9538

PRODUCTION DATA

5.6 I²C Interface Timing Requirements

over operating free-air temperature range (unless otherwise noted) (see Figure 6-1)

			MIN	MAX	UNIT
STANDARD MODE
f_scl	I²C clock frequency		0	100	kHz
t_sch	I²C clock high time		4		μs
t_scl	I²C clock low time		4.7		μs
t_sp	I²C spike time			50	ns
t_sds	I²C serial-data setup time		250		ns
t_sdh	I²C serial-data hold time		0		ns
t_icr	I²C input rise time			1000	ns
t_icf	I²C input fall time			300	ns
t_ocf	I²C output fall time	10-pF to 400-pF bus		300	ns
t_buf	I²C bus free time between Stop and Start		4.7		μs
t_sts	I²C Start or repeated Start condition setup		4.7		μs
t_sth	I²C Start or repeated Start condition hold		4		μs
t_sps	I²C Stop condition setup		4		μs
t_vd(data)	Valid data time	SCL low to SDA output valid	300		ns
t_vd(ack)	Valid data time of ACK condition	ACK signal from SCL low to SDA (out) low	0.3	3.45	μs
C_b	I²C bus capacitive load			400	ns
FAST MODE
f_scl	I²C clock frequency		0	400	kHz
t_sch	I²C clock high time		0.6		μs
t_scl	I²C clock low time		1.3		μs
t_sp	I²C spike time			50	ns
t_sds	I²C serial-data setup time		100		ns
t_sdh	I²C serial-data hold time		0		ns
t_icr	I²C input rise time		20 + 0.1C_b ⁽¹⁾	300	ns
t_icf	I²C input fall time		20 + 0.1C_b ⁽¹⁾	300	ns
t_ocf	I²C output fall time	10-pF to 400-pF bus	20 + 0.1C_b ⁽¹⁾	300	ns
t_buf	I²C bus free time between Stop and Start		1.3		μs
t_sts	I²C Start or repeated Start condition setup		0.6		μs
t_sth	I²C Start or repeated Start condition hold		0.6		μs
t_sps	I²C Stop condition setup		0.6		μs
t_vd(data)	Valid data time	SCL low to SDA output valid	50		ns
t_vd(ack)	Valid data time of ACK condition	ACK signal from SCL low to SDA (out) low	0.1	0.9	μs
C_b	I²C bus capacitive load			400	ns

(1) C_b = Total capacitance of one bus in pF